Why is My Spring Boot Application Failing to Auto-Generate the Database Schema?

Unable to Auto-Generate Database Schema in Spring Boot

Spring Boot provides the ability to automatically create the database schema upon application startup using the spring.jpa.hibernate.ddl-auto property. However, if this is not working as expected, several factors could be contributing to the issue.

Causes and Solutions

1. Classpath Issue

Ensure that your entity classes are located in the same package or a subpackage of the class annotated with @EnableAutoConfiguration. If they are not, they will not be detected by Spring and the schema creation will fail.

2. Hibernate Configuration Errors

Check your application.properties file. If you are using Hibernate-specific options, try replacing them with the following:

spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.hibernate.ddl-auto=update
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=test
spring.datasource.password=

Remove the manual loading of the driver class, as it is unnecessary in Spring Boot.

3. Application.properties Location

Confirm that your application.properties file is correctly placed in the src/main/resources folder.

4. Database Dialect

If the database dialect is not specified correctly, Spring Boot may default to an in-memory database. Check your console output to see if there are any attempts to connect to a different database than expected.

By addressing these potential issues, you can ensure that Spring Boot will automatically generate the database schema as per your defined configurations.

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